[libsigrok.git] / src / hardware / openbench-logic-sniffer / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include "protocol.h"

#define SERIALCOMM "115200/8n1"

static const uint32_t drvopts[] = {
	SR_CONF_LOGIC_ANALYZER,
};

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
};

static const uint32_t devopts[] = {
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
	SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_EXTERNAL_CLOCK | SR_CONF_SET,
	SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
	SR_CONF_SWAP | SR_CONF_SET,
	SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
};

static const int32_t trigger_matches[] = {
	SR_TRIGGER_ZERO,
	SR_TRIGGER_ONE,
};

#define STR_PATTERN_NONE     "None"
#define STR_PATTERN_EXTERNAL "External"
#define STR_PATTERN_INTERNAL "Internal"

/* Supported methods of test pattern outputs */
enum {
	/**
	 * Capture pins 31:16 (unbuffered wing) output a test pattern
	 * that can captured on pins 0:15.
	 */
	PATTERN_EXTERNAL,

	/** Route test pattern internally to capture buffer. */
	PATTERN_INTERNAL,
};

static const char *patterns[] = {
	STR_PATTERN_NONE,
	STR_PATTERN_EXTERNAL,
	STR_PATTERN_INTERNAL,
};

/* Channels are numbered 0-31 (on the PCB silkscreen). */
SR_PRIV const char *ols_channel_names[] = {
	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
	"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
	"24", "25", "26", "27", "28", "29", "30", "31",
};

/* Default supported samplerates, can be overridden by device metadata. */
static const uint64_t samplerates[] = {
	SR_HZ(10),
	SR_MHZ(200),
	SR_HZ(1),
};

#define RESPONSE_DELAY_US (10 * 1000)

SR_PRIV struct sr_dev_driver ols_driver_info;

static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	struct sr_config *src;
	struct sr_dev_inst *sdi;
	struct drv_context *drvc;
	struct sr_serial_dev_inst *serial;
	GSList *l, *devices;
	int ret;
	unsigned int i;
	const char *conn, *serialcomm;
	char buf[8];

	drvc = di->context;

	devices = NULL;

	conn = serialcomm = NULL;
	for (l = options; l; l = l->next) {
		src = l->data;
		switch (src->key) {
		case SR_CONF_CONN:
			conn = g_variant_get_string(src->data, NULL);
			break;
		case SR_CONF_SERIALCOMM:
			serialcomm = g_variant_get_string(src->data, NULL);
			break;
		}
	}
	if (!conn)
		return NULL;

	if (!serialcomm)
		serialcomm = SERIALCOMM;

	serial = sr_serial_dev_inst_new(conn, serialcomm);

	/* The discovery procedure is like this: first send the Reset
	 * command (0x00) 5 times, since the device could be anywhere
	 * in a 5-byte command. Then send the ID command (0x02).
	 * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
	 * have a match.
	 */
	sr_info("Probing %s.", conn);
	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
		return NULL;

	ret = SR_OK;
	for (i = 0; i < 5; i++) {
		if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
			sr_err("Port %s is not writable.", conn);
			break;
		}
	}
	if (ret != SR_OK) {
		serial_close(serial);
		sr_err("Could not use port %s. Quitting.", conn);
		return NULL;
	}
	send_shortcommand(serial, CMD_ID);

	g_usleep(RESPONSE_DELAY_US);

	if (sp_input_waiting(serial->data) == 0) {
		sr_dbg("Didn't get any reply.");
		return NULL;
	}

	ret = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
	if (ret != 4) {
		sr_err("Invalid reply (expected 4 bytes, got %d).", ret);
		return NULL;
	}

	if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
		sr_err("Invalid reply (expected '1SLO' or '1ALS', got "
		       "'%c%c%c%c').", buf[0], buf[1], buf[2], buf[3]);
		return NULL;
	}

	/* Definitely using the OLS protocol, check if it supports
	 * the metadata command.
	 */
	send_shortcommand(serial, CMD_METADATA);

	g_usleep(RESPONSE_DELAY_US);

	if (sp_input_waiting(serial->data) != 0) {
		/* Got metadata. */
		sdi = get_metadata(serial);
	} else {
		/* Not an OLS -- some other board that uses the sump protocol. */
		sr_info("Device does not support metadata.");
		sdi = g_malloc0(sizeof(struct sr_dev_inst));
		sdi->status = SR_ST_INACTIVE;
		sdi->vendor = g_strdup("Sump");
		sdi->model = g_strdup("Logic Analyzer");
		sdi->version = g_strdup("v1.0");
		sdi->driver = di;
		for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
			sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
					ols_channel_names[i]);
		sdi->priv = ols_dev_new();
	}
	/* Configure samplerate and divider. */
	if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
		sr_dbg("Failed to set default samplerate (%"PRIu64").",
				DEFAULT_SAMPLERATE);
	sdi->inst_type = SR_INST_SERIAL;
	sdi->conn = serial;

	drvc->instances = g_slist_append(drvc->instances, sdi);
	devices = g_slist_append(devices, sdi);

	serial_close(serial);

	return devices;
}

static GSList *dev_list(const struct sr_dev_driver *di)
{
	return ((struct drv_context *)(di->context))->instances;
}

static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;

	(void)cg;

	if (!sdi)
		return SR_ERR_ARG;

	devc = sdi->priv;
	switch (key) {
	case SR_CONF_SAMPLERATE:
		*data = g_variant_new_uint64(devc->cur_samplerate);
		break;
	case SR_CONF_CAPTURE_RATIO:
		*data = g_variant_new_uint64(devc->capture_ratio);
		break;
	case SR_CONF_LIMIT_SAMPLES:
		*data = g_variant_new_uint64(devc->limit_samples);
		break;
	case SR_CONF_PATTERN_MODE:
		if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
			*data = g_variant_new_string(STR_PATTERN_EXTERNAL);
		else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
			*data = g_variant_new_string(STR_PATTERN_INTERNAL);
		else
			*data = g_variant_new_string(STR_PATTERN_NONE);
		break;
	case SR_CONF_RLE:
		*data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	uint16_t flag;
	uint64_t tmp_u64;
	int ret;
	const char *stropt;

	(void)cg;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	devc = sdi->priv;

	switch (key) {
	case SR_CONF_SAMPLERATE:
		tmp_u64 = g_variant_get_uint64(data);
		if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
			return SR_ERR_SAMPLERATE;
		ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
		break;
	case SR_CONF_LIMIT_SAMPLES:
		tmp_u64 = g_variant_get_uint64(data);
		if (tmp_u64 < MIN_NUM_SAMPLES)
			return SR_ERR;
		devc->limit_samples = tmp_u64;
		ret = SR_OK;
		break;
	case SR_CONF_CAPTURE_RATIO:
		devc->capture_ratio = g_variant_get_uint64(data);
		if (devc->capture_ratio < 0 || devc->capture_ratio > 100)
			ret = SR_ERR;
		else
			ret = SR_OK;
		break;
	case SR_CONF_EXTERNAL_CLOCK:
		if (g_variant_get_boolean(data)) {
			sr_info("Enabling external clock.");
			devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
		} else {
			sr_info("Disabled external clock.");
			devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
		}
		ret = SR_OK;
		break;
	case SR_CONF_PATTERN_MODE:
		stropt = g_variant_get_string(data, NULL);
		ret = SR_OK;
		flag = 0xffff;
		if (!strcmp(stropt, STR_PATTERN_NONE)) {
			sr_info("Disabling test modes.");
			flag = 0x0000;
		}else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
			sr_info("Enabling internal test mode.");
			flag = FLAG_INTERNAL_TEST_MODE;
		} else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
			sr_info("Enabling external test mode.");
			flag = FLAG_EXTERNAL_TEST_MODE;
		} else {
			ret = SR_ERR;
		}
		if (flag != 0xffff) {
			devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
			devc->flag_reg |= flag;
		}
		break;
	case SR_CONF_SWAP:
		if (g_variant_get_boolean(data)) {
			sr_info("Enabling channel swapping.");
			devc->flag_reg |= FLAG_SWAP_CHANNELS;
		} else {
			sr_info("Disabling channel swapping.");
			devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
		}
		ret = SR_OK;
		break;

	case SR_CONF_RLE:
		if (g_variant_get_boolean(data)) {
			sr_info("Enabling RLE.");
			devc->flag_reg |= FLAG_RLE;
		} else {
			sr_info("Disabling RLE.");
			devc->flag_reg &= ~FLAG_RLE;
		}
		ret = SR_OK;
		break;
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
		const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	GVariant *gvar, *grange[2];
	GVariantBuilder gvb;
	int num_ols_changrp, i;

	(void)cg;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
				scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
		break;
	case SR_CONF_DEVICE_OPTIONS:
		if (!sdi)
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
		else
			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
					devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
		break;
	case SR_CONF_SAMPLERATE:
		g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
		gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
				ARRAY_SIZE(samplerates), sizeof(uint64_t));
		g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
		*data = g_variant_builder_end(&gvb);
		break;
	case SR_CONF_TRIGGER_MATCH:
		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
				trigger_matches, ARRAY_SIZE(trigger_matches),
				sizeof(int32_t));
		break;
	case SR_CONF_PATTERN_MODE:
		*data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
		break;
	case SR_CONF_LIMIT_SAMPLES:
		if (!sdi)
			return SR_ERR_ARG;
		devc = sdi->priv;
		if (devc->flag_reg & FLAG_RLE)
			return SR_ERR_NA;
		if (devc->max_samples == 0)
			/* Device didn't specify sample memory size in metadata. */
			return SR_ERR_NA;
		/*
		 * Channel groups are turned off if no channels in that group are
		 * enabled, making more room for samples for the enabled group.
		*/
		ols_channel_mask(sdi);
		num_ols_changrp = 0;
		for (i = 0; i < 4; i++) {
			if (devc->channel_mask & (0xff << (i * 8)))
				num_ols_changrp++;
		}
		grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
		if (num_ols_changrp)
			grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
		else
			grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
		*data = g_variant_new_tuple(grange, 2);
		break;
	default:
		return SR_ERR_NA;
	}

	return SR_OK;
}

static int set_trigger(const struct sr_dev_inst *sdi, int stage)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	uint8_t cmd, arg[4];

	devc = sdi->priv;
	serial = sdi->conn;

	cmd = CMD_SET_TRIGGER_MASK + stage * 4;
	arg[0] = devc->trigger_mask[stage] & 0xff;
	arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
	arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
	arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
	if (send_longcommand(serial, cmd, arg) != SR_OK)
		return SR_ERR;

	cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
	arg[0] = devc->trigger_value[stage] & 0xff;
	arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
	arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
	arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
	if (send_longcommand(serial, cmd, arg) != SR_OK)
		return SR_ERR;

	cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
	arg[0] = arg[1] = arg[3] = 0x00;
	arg[2] = stage;
	if (stage == devc->num_stages)
		/* Last stage, fire when this one matches. */
		arg[3] |= TRIGGER_START;
	if (send_longcommand(serial, cmd, arg) != SR_OK)
		return SR_ERR;

	return SR_OK;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_serial_dev_inst *serial;
	uint16_t samplecount, readcount, delaycount;
	uint8_t ols_changrp_mask, arg[4];
	int num_ols_changrp;
	int ret, i;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	devc = sdi->priv;
	serial = sdi->conn;

	ols_channel_mask(sdi);

	num_ols_changrp = 0;
	ols_changrp_mask = 0;
	for (i = 0; i < 4; i++) {
		if (devc->channel_mask & (0xff << (i * 8))) {
			ols_changrp_mask |= (1 << i);
			num_ols_changrp++;
		}
	}

	/*
	 * Limit readcount to prevent reading past the end of the hardware
	 * buffer.
	 */
	samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
	readcount = samplecount / 4;

	/* Rather read too many samples than too few. */
	if (samplecount % 4 != 0)
		readcount++;

	/* Basic triggers. */
	if (ols_convert_trigger(sdi) != SR_OK) {
		sr_err("Failed to configure channels.");
		return SR_ERR;
	}
	if (devc->num_stages > 0) {
		delaycount = readcount * (1 - devc->capture_ratio / 100.0);
		devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
		for (i = 0; i <= devc->num_stages; i++) {
			sr_dbg("Setting OLS stage %d trigger.", i);
			if ((ret = set_trigger(sdi, i)) != SR_OK)
				return ret;
		}
	} else {
		/* No triggers configured, force trigger on first stage. */
		sr_dbg("Forcing trigger at stage 0.");
		if ((ret = set_trigger(sdi, 0)) != SR_OK)
			return ret;
		delaycount = readcount;
	}

	/* Samplerate. */
	sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
			devc->cur_samplerate, devc->cur_samplerate_divider);
	arg[0] = devc->cur_samplerate_divider & 0xff;
	arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
	arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
	arg[3] = 0x00;
	if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
		return SR_ERR;

	/* Send sample limit and pre/post-trigger capture ratio. */
	sr_dbg("Setting sample limit %d, trigger point at %d",
			(readcount - 1) * 4, (delaycount - 1) * 4);
	arg[0] = ((readcount - 1) & 0xff);
	arg[1] = ((readcount - 1) & 0xff00) >> 8;
	arg[2] = ((delaycount - 1) & 0xff);
	arg[3] = ((delaycount - 1) & 0xff00) >> 8;
	if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
		return SR_ERR;

	/* Flag register. */
	sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
			devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
			devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
			devc->flag_reg & FLAG_RLE ? "on" : "off",
			devc->flag_reg & FLAG_FILTER ? "on": "off",
			devc->flag_reg & FLAG_DEMUX ? "on" : "off");
	/*
	 * Enable/disable OLS channel groups in the flag register according
	 * to the channel mask. 1 means "disable channel".
	 */
	devc->flag_reg |= ~(ols_changrp_mask << 2) & 0x3c;
	arg[0] = devc->flag_reg & 0xff;
	arg[1] = devc->flag_reg >> 8;
	arg[2] = arg[3] = 0x00;
	if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
		return SR_ERR;

	/* Start acquisition on the device. */
	if (send_shortcommand(serial, CMD_RUN) != SR_OK)
		return SR_ERR;

	/* Reset all operational states. */
	devc->rle_count = devc->num_transfers = 0;
	devc->num_samples = devc->num_bytes = 0;
	devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
	memset(devc->sample, 0, 4);

	std_session_send_df_header(sdi, LOG_PREFIX);

	/* If the device stops sending for longer than it takes to send a byte,
	 * that means it's finished. But wait at least 100 ms to be safe.
	 */
	serial_source_add(sdi->session, serial, G_IO_IN, 100,
			ols_receive_data, (struct sr_dev_inst *)sdi);

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	abort_acquisition(sdi);

	return SR_OK;
}

SR_PRIV struct sr_dev_driver ols_driver_info = {
	.name = "ols",
	.longname = "Openbench Logic Sniffer",
	.api_version = 1,
	.init = init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = NULL,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = std_serial_dev_open,
	.dev_close = std_serial_dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <config.h>
	21	#include "protocol.h"
	22
	23	#define SERIALCOMM "115200/8n1"
	24
	25	static const uint32_t drvopts[] = {
	26	SR_CONF_LOGIC_ANALYZER,
	27	};
	28
	29	static const uint32_t scanopts[] = {
	30	SR_CONF_CONN,
	31	SR_CONF_SERIALCOMM,
	32	};
	33
	34	static const uint32_t devopts[] = {
	35	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	36	SR_CONF_SAMPLERATE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	37	SR_CONF_TRIGGER_MATCH \| SR_CONF_LIST,
	38	SR_CONF_CAPTURE_RATIO \| SR_CONF_GET \| SR_CONF_SET,
	39	SR_CONF_EXTERNAL_CLOCK \| SR_CONF_SET,
	40	SR_CONF_PATTERN_MODE \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	41	SR_CONF_SWAP \| SR_CONF_SET,
	42	SR_CONF_RLE \| SR_CONF_GET \| SR_CONF_SET,
	43	};
	44
	45	static const int32_t trigger_matches[] = {
	46	SR_TRIGGER_ZERO,
	47	SR_TRIGGER_ONE,
	48	};
	49
	50	#define STR_PATTERN_NONE "None"
	51	#define STR_PATTERN_EXTERNAL "External"
	52	#define STR_PATTERN_INTERNAL "Internal"
	53
	54	/* Supported methods of test pattern outputs */
	55	enum {
	56	/**
	57	* Capture pins 31:16 (unbuffered wing) output a test pattern
	58	* that can captured on pins 0:15.
	59	*/
	60	PATTERN_EXTERNAL,
	61
	62	/** Route test pattern internally to capture buffer. */
	63	PATTERN_INTERNAL,
	64	};
	65
	66	static const char *patterns[] = {
	67	STR_PATTERN_NONE,
	68	STR_PATTERN_EXTERNAL,
	69	STR_PATTERN_INTERNAL,
	70	};
	71
	72	/* Channels are numbered 0-31 (on the PCB silkscreen). */
	73	SR_PRIV const char *ols_channel_names[] = {
	74	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
	75	"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
	76	"24", "25", "26", "27", "28", "29", "30", "31",
	77	};
	78
	79	/* Default supported samplerates, can be overridden by device metadata. */
	80	static const uint64_t samplerates[] = {
	81	SR_HZ(10),
	82	SR_MHZ(200),
	83	SR_HZ(1),
	84	};
	85
	86	#define RESPONSE_DELAY_US (10 * 1000)
	87
	88	SR_PRIV struct sr_dev_driver ols_driver_info;
	89
	90	static int init(struct sr_dev_driver di, struct sr_context sr_ctx)
	91	{
	92	return std_init(sr_ctx, di, LOG_PREFIX);
	93	}
	94
	95	static GSList scan(struct sr_dev_driver di, GSList *options)
	96	{
	97	struct sr_config *src;
	98	struct sr_dev_inst *sdi;
	99	struct drv_context *drvc;
	100	struct sr_serial_dev_inst *serial;
	101	GSList l, devices;
	102	int ret;
	103	unsigned int i;
	104	const char conn, serialcomm;
	105	char buf[8];
	106
	107	drvc = di->context;
	108
	109	devices = NULL;
	110
	111	conn = serialcomm = NULL;
	112	for (l = options; l; l = l->next) {
	113	src = l->data;
	114	switch (src->key) {
	115	case SR_CONF_CONN:
	116	conn = g_variant_get_string(src->data, NULL);
	117	break;
	118	case SR_CONF_SERIALCOMM:
	119	serialcomm = g_variant_get_string(src->data, NULL);
	120	break;
	121	}
	122	}
	123	if (!conn)
	124	return NULL;
	125
	126	if (!serialcomm)
	127	serialcomm = SERIALCOMM;
	128
	129	serial = sr_serial_dev_inst_new(conn, serialcomm);
	130
	131	/* The discovery procedure is like this: first send the Reset
	132	* command (0x00) 5 times, since the device could be anywhere
	133	* in a 5-byte command. Then send the ID command (0x02).
	134	* If the device responds with 4 bytes ("OLS1" or "SLA1"), we
	135	* have a match.
	136	*/
	137	sr_info("Probing %s.", conn);
	138	if (serial_open(serial, SERIAL_RDWR) != SR_OK)
	139	return NULL;
	140
	141	ret = SR_OK;
	142	for (i = 0; i < 5; i++) {
	143	if ((ret = send_shortcommand(serial, CMD_RESET)) != SR_OK) {
	144	sr_err("Port %s is not writable.", conn);
	145	break;
	146	}
	147	}
	148	if (ret != SR_OK) {
	149	serial_close(serial);
	150	sr_err("Could not use port %s. Quitting.", conn);
	151	return NULL;
	152	}
	153	send_shortcommand(serial, CMD_ID);
	154
	155	g_usleep(RESPONSE_DELAY_US);
	156
	157	if (sp_input_waiting(serial->data) == 0) {
	158	sr_dbg("Didn't get any reply.");
	159	return NULL;
	160	}
	161
	162	ret = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
	163	if (ret != 4) {
	164	sr_err("Invalid reply (expected 4 bytes, got %d).", ret);
	165	return NULL;
	166	}
	167
	168	if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
	169	sr_err("Invalid reply (expected '1SLO' or '1ALS', got "
	170	"'%c%c%c%c').", buf[0], buf[1], buf[2], buf[3]);
	171	return NULL;
	172	}
	173
	174	/* Definitely using the OLS protocol, check if it supports
	175	* the metadata command.
	176	*/
	177	send_shortcommand(serial, CMD_METADATA);
	178
	179	g_usleep(RESPONSE_DELAY_US);
	180
	181	if (sp_input_waiting(serial->data) != 0) {
	182	/* Got metadata. */
	183	sdi = get_metadata(serial);
	184	} else {
	185	/* Not an OLS -- some other board that uses the sump protocol. */
	186	sr_info("Device does not support metadata.");
	187	sdi = g_malloc0(sizeof(struct sr_dev_inst));
	188	sdi->status = SR_ST_INACTIVE;
	189	sdi->vendor = g_strdup("Sump");
	190	sdi->model = g_strdup("Logic Analyzer");
	191	sdi->version = g_strdup("v1.0");
	192	sdi->driver = di;
	193	for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
	194	sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
	195	ols_channel_names[i]);
	196	sdi->priv = ols_dev_new();
	197	}
	198	/* Configure samplerate and divider. */
	199	if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
	200	sr_dbg("Failed to set default samplerate (%"PRIu64").",
	201	DEFAULT_SAMPLERATE);
	202	sdi->inst_type = SR_INST_SERIAL;
	203	sdi->conn = serial;
	204
	205	drvc->instances = g_slist_append(drvc->instances, sdi);
	206	devices = g_slist_append(devices, sdi);
	207
	208	serial_close(serial);
	209
	210	return devices;
	211	}
	212
	213	static GSList dev_list(const struct sr_dev_driver di)
	214	{
	215	return ((struct drv_context *)(di->context))->instances;
	216	}
	217
	218	static int config_get(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	219	const struct sr_channel_group *cg)
	220	{
	221	struct dev_context *devc;
	222
	223	(void)cg;
	224
	225	if (!sdi)
	226	return SR_ERR_ARG;
	227
	228	devc = sdi->priv;
	229	switch (key) {
	230	case SR_CONF_SAMPLERATE:
	231	*data = g_variant_new_uint64(devc->cur_samplerate);
	232	break;
	233	case SR_CONF_CAPTURE_RATIO:
	234	*data = g_variant_new_uint64(devc->capture_ratio);
	235	break;
	236	case SR_CONF_LIMIT_SAMPLES:
	237	*data = g_variant_new_uint64(devc->limit_samples);
	238	break;
	239	case SR_CONF_PATTERN_MODE:
	240	if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
	241	*data = g_variant_new_string(STR_PATTERN_EXTERNAL);
	242	else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
	243	*data = g_variant_new_string(STR_PATTERN_INTERNAL);
	244	else
	245	*data = g_variant_new_string(STR_PATTERN_NONE);
	246	break;
	247	case SR_CONF_RLE:
	248	*data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
	249	break;
	250	default:
	251	return SR_ERR_NA;
	252	}
	253
	254	return SR_OK;
	255	}
	256
	257	static int config_set(uint32_t key, GVariant data, const struct sr_dev_inst sdi,
	258	const struct sr_channel_group *cg)
	259	{
	260	struct dev_context *devc;
	261	uint16_t flag;
	262	uint64_t tmp_u64;
	263	int ret;
	264	const char *stropt;
	265
	266	(void)cg;
	267
	268	if (sdi->status != SR_ST_ACTIVE)
	269	return SR_ERR_DEV_CLOSED;
	270
	271	devc = sdi->priv;
	272
	273	switch (key) {
	274	case SR_CONF_SAMPLERATE:
	275	tmp_u64 = g_variant_get_uint64(data);
	276	if (tmp_u64 < samplerates[0] \|\| tmp_u64 > samplerates[1])
	277	return SR_ERR_SAMPLERATE;
	278	ret = ols_set_samplerate(sdi, g_variant_get_uint64(data));
	279	break;
	280	case SR_CONF_LIMIT_SAMPLES:
	281	tmp_u64 = g_variant_get_uint64(data);
	282	if (tmp_u64 < MIN_NUM_SAMPLES)
	283	return SR_ERR;
	284	devc->limit_samples = tmp_u64;
	285	ret = SR_OK;
	286	break;
	287	case SR_CONF_CAPTURE_RATIO:
	288	devc->capture_ratio = g_variant_get_uint64(data);
	289	if (devc->capture_ratio < 0 \|\| devc->capture_ratio > 100)
	290	ret = SR_ERR;
	291	else
	292	ret = SR_OK;
	293	break;
	294	case SR_CONF_EXTERNAL_CLOCK:
	295	if (g_variant_get_boolean(data)) {
	296	sr_info("Enabling external clock.");
	297	devc->flag_reg \|= FLAG_CLOCK_EXTERNAL;
	298	} else {
	299	sr_info("Disabled external clock.");
	300	devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
	301	}
	302	ret = SR_OK;
	303	break;
	304	case SR_CONF_PATTERN_MODE:
	305	stropt = g_variant_get_string(data, NULL);
	306	ret = SR_OK;
	307	flag = 0xffff;
	308	if (!strcmp(stropt, STR_PATTERN_NONE)) {
	309	sr_info("Disabling test modes.");
	310	flag = 0x0000;
	311	}else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
	312	sr_info("Enabling internal test mode.");
	313	flag = FLAG_INTERNAL_TEST_MODE;
	314	} else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
	315	sr_info("Enabling external test mode.");
	316	flag = FLAG_EXTERNAL_TEST_MODE;
	317	} else {
	318	ret = SR_ERR;
	319	}
	320	if (flag != 0xffff) {
	321	devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE \| FLAG_EXTERNAL_TEST_MODE);
	322	devc->flag_reg \|= flag;
	323	}
	324	break;
	325	case SR_CONF_SWAP:
	326	if (g_variant_get_boolean(data)) {
	327	sr_info("Enabling channel swapping.");
	328	devc->flag_reg \|= FLAG_SWAP_CHANNELS;
	329	} else {
	330	sr_info("Disabling channel swapping.");
	331	devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
	332	}
	333	ret = SR_OK;
	334	break;
	335
	336	case SR_CONF_RLE:
	337	if (g_variant_get_boolean(data)) {
	338	sr_info("Enabling RLE.");
	339	devc->flag_reg \|= FLAG_RLE;
	340	} else {
	341	sr_info("Disabling RLE.");
	342	devc->flag_reg &= ~FLAG_RLE;
	343	}
	344	ret = SR_OK;
	345	break;
	346	default:
	347	ret = SR_ERR_NA;
	348	}
	349
	350	return ret;
	351	}
	352
	353	static int config_list(uint32_t key, GVariant *data, const struct sr_dev_inst sdi,
	354	const struct sr_channel_group *cg)
	355	{
	356	struct dev_context *devc;
	357	GVariant gvar, grange[2];
	358	GVariantBuilder gvb;
	359	int num_ols_changrp, i;
	360
	361	(void)cg;
	362
	363	switch (key) {
	364	case SR_CONF_SCAN_OPTIONS:
	365	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	366	scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
	367	break;
	368	case SR_CONF_DEVICE_OPTIONS:
	369	if (!sdi)
	370	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	371	drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
	372	else
	373	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
	374	devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
	375	break;
	376	case SR_CONF_SAMPLERATE:
	377	g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
	378	gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
	379	ARRAY_SIZE(samplerates), sizeof(uint64_t));
	380	g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
	381	*data = g_variant_builder_end(&gvb);
	382	break;
	383	case SR_CONF_TRIGGER_MATCH:
	384	*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
	385	trigger_matches, ARRAY_SIZE(trigger_matches),
	386	sizeof(int32_t));
	387	break;
	388	case SR_CONF_PATTERN_MODE:
	389	*data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
	390	break;
	391	case SR_CONF_LIMIT_SAMPLES:
	392	if (!sdi)
	393	return SR_ERR_ARG;
	394	devc = sdi->priv;
	395	if (devc->flag_reg & FLAG_RLE)
	396	return SR_ERR_NA;
	397	if (devc->max_samples == 0)
	398	/* Device didn't specify sample memory size in metadata. */
	399	return SR_ERR_NA;
	400	/*
	401	* Channel groups are turned off if no channels in that group are
	402	* enabled, making more room for samples for the enabled group.
	403	*/
	404	ols_channel_mask(sdi);
	405	num_ols_changrp = 0;
	406	for (i = 0; i < 4; i++) {
	407	if (devc->channel_mask & (0xff << (i * 8)))
	408	num_ols_changrp++;
	409	}
	410	grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
	411	if (num_ols_changrp)
	412	grange[1] = g_variant_new_uint64(devc->max_samples / num_ols_changrp);
	413	else
	414	grange[1] = g_variant_new_uint64(MIN_NUM_SAMPLES);
	415	*data = g_variant_new_tuple(grange, 2);
	416	break;
	417	default:
	418	return SR_ERR_NA;
	419	}
	420
	421	return SR_OK;
	422	}
	423
	424	static int set_trigger(const struct sr_dev_inst *sdi, int stage)
	425	{
	426	struct dev_context *devc;
	427	struct sr_serial_dev_inst *serial;
	428	uint8_t cmd, arg[4];
	429
	430	devc = sdi->priv;
	431	serial = sdi->conn;
	432
	433	cmd = CMD_SET_TRIGGER_MASK + stage * 4;
	434	arg[0] = devc->trigger_mask[stage] & 0xff;
	435	arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
	436	arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
	437	arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
	438	if (send_longcommand(serial, cmd, arg) != SR_OK)
	439	return SR_ERR;
	440
	441	cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
	442	arg[0] = devc->trigger_value[stage] & 0xff;
	443	arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
	444	arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
	445	arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
	446	if (send_longcommand(serial, cmd, arg) != SR_OK)
	447	return SR_ERR;
	448
	449	cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
	450	arg[0] = arg[1] = arg[3] = 0x00;
	451	arg[2] = stage;
	452	if (stage == devc->num_stages)
	453	/* Last stage, fire when this one matches. */
	454	arg[3] \|= TRIGGER_START;
	455	if (send_longcommand(serial, cmd, arg) != SR_OK)
	456	return SR_ERR;
	457
	458	return SR_OK;
	459	}
	460
	461	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	462	{
	463	struct dev_context *devc;
	464	struct sr_serial_dev_inst *serial;
	465	uint16_t samplecount, readcount, delaycount;
	466	uint8_t ols_changrp_mask, arg[4];
	467	int num_ols_changrp;
	468	int ret, i;
	469
	470	if (sdi->status != SR_ST_ACTIVE)
	471	return SR_ERR_DEV_CLOSED;
	472
	473	devc = sdi->priv;
	474	serial = sdi->conn;
	475
	476	ols_channel_mask(sdi);
	477
	478	num_ols_changrp = 0;
	479	ols_changrp_mask = 0;
	480	for (i = 0; i < 4; i++) {
	481	if (devc->channel_mask & (0xff << (i * 8))) {
	482	ols_changrp_mask \|= (1 << i);
	483	num_ols_changrp++;
	484	}
	485	}
	486
	487	/*
	488	* Limit readcount to prevent reading past the end of the hardware
	489	* buffer.
	490	*/
	491	samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
	492	readcount = samplecount / 4;
	493
	494	/* Rather read too many samples than too few. */
	495	if (samplecount % 4 != 0)
	496	readcount++;
	497
	498	/* Basic triggers. */
	499	if (ols_convert_trigger(sdi) != SR_OK) {
	500	sr_err("Failed to configure channels.");
	501	return SR_ERR;
	502	}
	503	if (devc->num_stages > 0) {
	504	delaycount = readcount * (1 - devc->capture_ratio / 100.0);
	505	devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
	506	for (i = 0; i <= devc->num_stages; i++) {
	507	sr_dbg("Setting OLS stage %d trigger.", i);
	508	if ((ret = set_trigger(sdi, i)) != SR_OK)
	509	return ret;
	510	}
	511	} else {
	512	/* No triggers configured, force trigger on first stage. */
	513	sr_dbg("Forcing trigger at stage 0.");
	514	if ((ret = set_trigger(sdi, 0)) != SR_OK)
	515	return ret;
	516	delaycount = readcount;
	517	}
	518
	519	/* Samplerate. */
	520	sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
	521	devc->cur_samplerate, devc->cur_samplerate_divider);
	522	arg[0] = devc->cur_samplerate_divider & 0xff;
	523	arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
	524	arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
	525	arg[3] = 0x00;
	526	if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
	527	return SR_ERR;
	528
	529	/* Send sample limit and pre/post-trigger capture ratio. */
	530	sr_dbg("Setting sample limit %d, trigger point at %d",
	531	(readcount - 1) * 4, (delaycount - 1) * 4);
	532	arg[0] = ((readcount - 1) & 0xff);
	533	arg[1] = ((readcount - 1) & 0xff00) >> 8;
	534	arg[2] = ((delaycount - 1) & 0xff);
	535	arg[3] = ((delaycount - 1) & 0xff00) >> 8;
	536	if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
	537	return SR_ERR;
	538
	539	/* Flag register. */
	540	sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
	541	devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
	542	devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
	543	devc->flag_reg & FLAG_RLE ? "on" : "off",
	544	devc->flag_reg & FLAG_FILTER ? "on": "off",
	545	devc->flag_reg & FLAG_DEMUX ? "on" : "off");
	546	/*
	547	* Enable/disable OLS channel groups in the flag register according
	548	* to the channel mask. 1 means "disable channel".
	549	*/
	550	devc->flag_reg \|= ~(ols_changrp_mask << 2) & 0x3c;
	551	arg[0] = devc->flag_reg & 0xff;
	552	arg[1] = devc->flag_reg >> 8;
	553	arg[2] = arg[3] = 0x00;
	554	if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
	555	return SR_ERR;
	556
	557	/* Start acquisition on the device. */
	558	if (send_shortcommand(serial, CMD_RUN) != SR_OK)
	559	return SR_ERR;
	560
	561	/* Reset all operational states. */
	562	devc->rle_count = devc->num_transfers = 0;
	563	devc->num_samples = devc->num_bytes = 0;
	564	devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
	565	memset(devc->sample, 0, 4);
	566
	567	std_session_send_df_header(sdi, LOG_PREFIX);
	568
	569	/* If the device stops sending for longer than it takes to send a byte,
	570	* that means it's finished. But wait at least 100 ms to be safe.
	571	*/
	572	serial_source_add(sdi->session, serial, G_IO_IN, 100,
	573	ols_receive_data, (struct sr_dev_inst *)sdi);
	574
	575	return SR_OK;
	576	}
	577
	578	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	579	{
	580	abort_acquisition(sdi);
	581
	582	return SR_OK;
	583	}
	584
	585	SR_PRIV struct sr_dev_driver ols_driver_info = {
	586	.name = "ols",
	587	.longname = "Openbench Logic Sniffer",
	588	.api_version = 1,
	589	.init = init,
	590	.cleanup = std_cleanup,
	591	.scan = scan,
	592	.dev_list = dev_list,
	593	.dev_clear = NULL,
	594	.config_get = config_get,
	595	.config_set = config_set,
	596	.config_list = config_list,
	597	.dev_open = std_serial_dev_open,
	598	.dev_close = std_serial_dev_close,
	599	.dev_acquisition_start = dev_acquisition_start,
	600	.dev_acquisition_stop = dev_acquisition_stop,
	601	.context = NULL,
	602	};